Maintenance method of metropolitan area optical cable line

The metropolitan area Optical cable line is mainly the pipeline optical cable, supplemented by the aerial and other laying way very few optical cables, its characteristics are: The line section is relatively short, can be divided into local trunking, user access network backbone and user to introduce optical cable, optical fiber cable Core number program is diverse (for example, Tianjin's metropolitan area network cable has 6, 8, 12, 24, 48, 72, 96, 144, 216, 288 core and so on, and more than 48 cores of fiber optic cable line section More, cable routing trend of complex. According to the line maintenance rules, the optical adapter on the ODM disk in the cable distribution frame (ODF) is the dividing point, the line equipment on the external side of the adapter is the range of the cable line maintenance, and the optical jumper part of the adapter inside to the optical transceiver belongs to the range of the transmission equipment maintenance. The basic task of maintenance of cable line equipment is to keep the line equipment intact, ensure good transmission quality, prevent and remove obstacles as soon as possible.





China's current maintenance and management status





due to the Technical division of Telecommunications Enterprises, cable line professional and transmission professional maintenance paragraph as described above is based on the ODM adapter as the demarcation point, so that the ODF left a weak link, transport professionals only consider the formation of transmission channels, and do not pay attention to the use of which fiber optic cable, which number of fiber, That is, no consideration is given to the physical route of optical system transmission; and optical cable line professional only consider the entire optical cable physical route, for the entire fiber optic cable core occupancy situation is basically not mastered, for the transmission of the Board of the transfer, occupy the core of the transmission and direction, transmission system of the actual trend is very little known. The information on the transmission lines and transmissions is the separation of manual management, which hardly communicates with each other and does not keep up with the actual changes. Transmission aspects of the jumper and line cable tail fiber standards are not uniform, some of the optical system has been deactivated fiber link and some used as a temporary transmission of fiber link jumper can not be removed in time, fiber link long time in the connectivity, resulting in confusion, causing misunderstanding. Therefore, it is easy to accumulate some difficult problems in the use and management of fiber core. With the construction and development of the user access network cable, relay optical fiber cable of the year increase and the continuous expansion of transmission, optical cable line professional and transmission professional separation, and on its not set up a comprehensive management system maintenance mode, obviously can not adapt to the construction of optical cable network, maintenance, use and management needs. 3lian.com





Originally, all over the metropolitan area network cable lines and other telecommunications pipeline maintenance is one. In the 2000 ~2001 of the telecom Industry and Industrial branch of the reform, the majority of telecommunications companies have taken the mode of centralized maintenance of optical cable lines, the cable line and its relying on the maintenance of the pipeline and the bar to separate, this separation, in the actual operation also shows some problems. Because the optical cable line and the pipeline, the Rod road all needs the daily inspection, separates the maintenance to be inevitable will cause the separation inspection. As far as telecommunications as a whole, the inspection staff overlap, resulting in increased maintenance input. In addition, external coordination and cooperation is not unified, but also easy to produce internal and external contradictions.




The main contents of
maintenance work





daily Patrol





Construction of the road, reconstruction and expansion of roads and other excavation of the road more and more each year, increase the intensity of large-scale mechanical construction damage to telecommunications pipelines, damage, damage, blocking optical cable lines so that the interruption of communication accidents often occur. Strengthening the daily patrol of telecommunication pipelines is an effective means to reduce or avoid damage to optical cable lines due to external force.




Periodic
tests for the preparation of




Regular irregular testing of
optical fiber optic cable is an important means to detect the blockage of optical fiber core. Most of the core number of Metro cable lines is larger, the current monitoring system does not have to monitor each core, a cable can only monitor a few of the core, the blocking of the core is not occupied in most cases can only be detected by regular irregular preparation of fiber tests.





Emergency Repair





in the process of repairing optical cable interruption, the cable Line maintenance Department should cooperate closely with the transmission equipment maintenance department, and obey the dispatch of the transmission maintenance department. Under normal circumstances, the optical system alarm, Transmission department first to determine whether the problem is the optical fiber line, is to immediately inform the Cable Line maintenance department, the maintenance staff through the core test to further determine the type of cable line fault, range, location, under conditions, In conjunction with the Transport Department as soon as possible to interrupt the optical system to temporarily jump to other spare core, so that communication recovery.





Technical Management





for the metropolitan area cable network, generally the same way by a number of optical cables, and the same bureau may have several cable transmission routes, to achieve dynamic scientific management:





(1) The structure, core number, physical routing direction, contacts and bifurcation points of each optical cable.





(2) The fiber core of each optical cable is used in the transmission.





(3) The ODM of the ODF that each optical cable enters.




The position and number of
(4) ODF in the transmission room, the location and number of the light end.





(5) Each optical end is matched by a jumper and a core, and in the Hop board, each jumper ends with one by one corresponding to the core.




Daily contact
Cable line, transmission and pipeline maintenance





from the optical cable line obstacle treatment and maintenance technology management, the cable line and transmission and pipeline maintenance should establish a contact system to close the relationship between the three. At present, there is no understanding of the transmission of optical cable lines, such as from one point to another light transmission, the middle may have to go through several hops, in order to achieve a more physical transmission routes, most of the circuitous transmission route, resulting in the middle hop more, the situation is complex. And for the cable line maintenance staff only know the routing of each cable, for the transmission of optical cable is basically unknown, mutual information transmission, communication lags behind the actual situation, in the failure to deal with even the phenomenon of prevarication. Transmission and optical cable line of information should be integrated and unified management, whether it is the transfer of occupation or optical cable line changes, can be known in time for the expansion of the whole network and transformation, with the municipal construction of optical cable relocation and cutting timely provide accurate and reliable information, It can analyze the existing problems and potential problems from two aspects of transmission and cable line, and improve the operation and maintenance quality of the whole network. Strengthen the daily connection of cable line, transmission and pipeline maintenance.





Optical Cable line departments should often exchange information with the transmission and pipeline departments to find out the problem in a timely manner.





Cable Line maintenance departments, transmission departments and pipeline departments should be active and timely exchange of information. The technology data management of optical fiber transmission and line should keep up with the actual and data sharing.





metropolitan area cable lines due to the municipal construction of the annual relocation of the cut is very large. No matter which side of the construction, cable cutting and wiring and transmission are closely related. Before cutting, both sides must make sure that the routing direction of the optical cable, the core number structure, the core occupancy, the transmission of the optical system through the end of the station, the middle jump contacts and so on to ascertain the registration verification. Wiring to be coupled with the transmission of light system first temporary jump, should try to first some particularly important system temporarily jump, and then the cable cut.





The cable lines are laid in the pipe and on the bar, cable line maintenance departments to actively maintain with the pipeline and Link Maintenance Department close contact, understand the construction of municipal construction dynamic, to have outside the construction section, cable maintenance personnel to the scene monitoring, to have important cable line section of the road is not regular patrol.





establishing automatic Management query system for optical cable transmission network





set up a metropolitan area cable transmission network automatic Management query system, and then extended to the local network, optical cable transmission network Unified, comprehensive, comprehensive, dynamic Computer Management. The maintenance and management of optical cable transmission network mainly includes the maintenance of the cable line and the management of the core usage, the scientific dynamic management of the whole network cable, the transmission occupation, the new optical cable, the transformation and other data can be modified at any time, keep up with the actual changes, so that the data is shared. At present, in some places in the maintenance and management of optical cable transmission network in the area, due to the lag of the line and transmission management, to know which cable occupies the situation and the optical transmission system fiber link situation, have to temporarily to the scene investigation, time-consuming and laborious. In particular, in some major cities, the sinks of the cable into the many, fiber optic cable of the tail fiber, jumper congestion, and other cables staggered, coupled with some unclear, to the unknown, the investigation is very difficult, sometimes even because to see clearly and instantaneous or short time to touch other optical transmission system. The establishment of optical cable transmission network automatic Management query system, so that the design, engineering, maintenance, asset Management departments can automatically query the required data at any time. Transmission link data from the transmission department or modify, optical cable line data from the line department to modify, to ensure accurate and complete data, optical cable transmission network operation and maintenance management of scientific, standardized, rigorous and efficient purposes.